Fig. 2

In vivo confocal microscopy images of meibomian gland (MG) acinar density (MAD), MG acinar longest diameter (MALD), and MG acinar shortest diameter (MASD). The multipoint tool was used to evaluate the number of clearly visible acinar unit (asterisk). The straight-line selection tool was used to trace and measure the MALD (L) and MASD (S). Compared with controls (A), the acini were obviously dilated and fused in active (B) and inactive Graves’ orbitopathy (C)